www.swimming.org/library/documents/2857/download
"You may need to do some education work with other centre users who may be concerned when sharing a
space with a trans person, especially if a trans customer looks to have different physical characteristics to the
gender they are identifying with i.e. a male to female trans customer who has not had top or bottom surgery
may still look like a male to others, and conversely with female to male trans customers.
"
"You should adopt a zero tolerance policy on any transphobic
behaviour from staff or centre users.
- Try to encourage your workforce to be aware of any potential
transphobia likely to happen before or after a session, both in or
around the centre, and empower them to challenge transphobic
language, attitudes and behaviours from other staff members,
customers and the general public too."
"Some swimmers who were born female but now identify
differently may wear what is called a ‘binder’ – this is a
tight piece of material that is wrapped around the top half
of the body in order to compress breasts to conceal them
behind clothing. This is perfectly safe to swim in, and
should be encouraged."
"Some swimmers may have a preference to wear less
clothing than usually expected. For example, some
swimmers may not want to wear anything on their top half,
so as to identify with their new gender, but if they have
not had top surgery this means that this person’s breasts
will be clearly visible. This needs to be talked about and an
amicable solution found. This may be appropriate to allow
during a trans specific session, but if a trans swimmer is
attending any other session in the timetable, then they
should be appropriately covered up – you wouldn’t allow a
woman to swim topless in a public session, and you need
to treat everyone the same."
So basically trans-identified women must cover up, but trans-identified men can shower nude with women and the women needed to be 'educated' to understand this. And if anyone complains turf them out under the 'zero tolerance against transphobia' policy.